U.S. patent application number 14/228447 was filed with the patent office on 2014-10-09 for vibrating acoustic device.
This patent application is currently assigned to AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.. The applicant listed for this patent is Yun Tang, Rongguan Zhou. Invention is credited to Yun Tang, Rongguan Zhou.
Application Number | 20140301579 14/228447 |
Document ID | / |
Family ID | 49150514 |
Filed Date | 2014-10-09 |
United States Patent
Application |
20140301579 |
Kind Code |
A1 |
Tang; Yun ; et al. |
October 9, 2014 |
Vibrating acoustic device
Abstract
Disclosed is a vibrating acoustic device. The vibrating acoustic
device for generating sound in full frequency band includes a
magnetic system, a first vibrating assembly mounted on an upper
side of the magnetic system for generating sound in low-frequency
region and a second vibrating assembly attached on a lower side of
the magnetic system for generating sound in high-frequency and
medium-frequency range. The first vibrating assembly includes a
vibrating plate for resonating with a resonate medium for
resonating and radiating sound in low-frequency region, and a first
coil partially inserted in the magnetic gap and driving the
vibrating plate; and the second vibrating assembly includes a
diaphragm and a second coil driving the diaphragm.
Inventors: |
Tang; Yun; (Shenzhen,
CN) ; Zhou; Rongguan; (Shenzhen, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Tang; Yun
Zhou; Rongguan |
Shenzhen
Shenzhen |
|
CN
CN |
|
|
Assignee: |
AAC ACOUSTIC TECHNOLOGIES
(SHENZHEN) CO., LTD.
Shenzhen
CN
|
Family ID: |
49150514 |
Appl. No.: |
14/228447 |
Filed: |
March 28, 2014 |
Current U.S.
Class: |
381/162 |
Current CPC
Class: |
H04R 9/025 20130101;
H04R 1/24 20130101; H04R 9/066 20130101 |
Class at
Publication: |
381/162 |
International
Class: |
H04R 1/00 20060101
H04R001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 5, 2013 |
CN |
201320169064.5 |
Claims
1. A vibrating acoustic device comprising: a holder having a hollow
space; a magnetic system received in the hollow space and
comprising a magnetic gap; a vibrating assembly mounted with the
holder and at least partially inserted in the magnetic gap, the
vibrating assembly comprising a first vibrating assembly mounted on
an upper portion of the holder for generating low frequency sound
and a second vibrating assembly attached on a lower portion of the
holder for generating high and medium frequency sound; wherein the
first vibrating assembly comprises a vibrating plate for resonating
with a resonate medium for resonating and radiating low frequency
sound and a first coil partially inserted in the magnetic gap and
driving the vibrating plate; and the second vibrating assembly
comprises a diaphragm and a second coil partially inserted in the
magnetic gap for driving the diaphragm.
2. The vibrating acoustic device as described in claim 1 further
comprising a first elastic supporting member sandwiched between the
magnetic system and the vibrating plate of the first vibrating
system, and surrounded by the first coil for elastically supporting
the magnetic system.
3. The vibrating acoustic device as described in claim 2 further
comprising a second elastic supporting member sandwiched between
the magnetic system and the vibrating plate of the first vibrating
system, and surrounding the first coil for elastically supporting
the magnetic system.
4. The vibrating acoustic device as described in claim 3, wherein
the first and second elastic supporting members are made of soft
silicone or foam, respectively.
5. The vibrating acoustic device as described in claim 1 further
comprising a second elastic supporting member sandwiched between a
lower side of the holder and the vibrating plate of the first
vibrating system, and surrounding the first coil for supporting the
magnetic system.
6. The vibrating acoustic device as described in claim 1 further
comprising a cover mounted on the resonate medium for receiving the
holder, and the cover has an upper plate, an acoustic hole
surrounded by the upper plate for exposing a part of the diaphragm,
and a sidewall extending from the upper plate and coupled to the
lower panel.
7. The vibrating acoustic device as described in claim 6, wherein
the sidewall comprises a supporting wall for supporting the upper
plate and an elastic wall connecting with the supporting wall and
the resonate medium for absorbing the vibration generating from the
resonate medium.
8. The vibrating acoustic device as described in claim 1, wherein
the magnetic system has a first magnetic conduction member and a
second magnetic conduction member surrounding the first magnetic
conduction member for forming the magnetic gap, at least one of the
first and second magnetic conduction members is a permanent
magnet.
9. The vibrating acoustic device as described in claim 8, wherein
the first and the second magnetic conduction members are spaced
from each other.
10. The vibrating acoustic device as described in claim 8, wherein
the first and the second magnetic conduction members are partially
connected with each other.
11. A vibrating acoustic device, comprising: a magnetic system
comprising a magnetic gap; a vibrating assembly mounted on the
magnetic system and partially inserted in the magnetic gap, the
vibrating assembly comprising a first vibrating assembly mounted on
an upper portion of the magnetic system for generating sound with
low frequency and a second vibrating assembly attached on a lower
portion of the magnetic system for generating sound with high and
medium frequency; wherein the first vibrating assembly comprises a
vibrating plate for resonating with a resonate medium for
resonating and radiating sound with low frequency, and a first coil
partially inserted in the magnetic gap and driving the vibrating
plate; and the second vibrating assembly comprises a diaphragm and
a second coil partially inserted in the magnetic gap for driving
the diaphragm.
12. The vibrating acoustic device as described in claim 11 further
comprising a first elastic supporting member sandwiched between the
magnetic system and the vibrating plate of the first vibrating
system, and surrounded by the first coil for elastically supporting
the magnetic system.
13. The vibrating acoustic device as described in claim 12 further
comprising a second elastic supporting member sandwiched between
the magnetic system and the vibrating plate of the first vibrating
system, and surrounding the first coil for elastically supporting
the magnetic system.
14. The vibrating acoustic device as described in claim 13, wherein
the first and second elastic supporting members are made of soft
silicone or foam, respectively.
15. The vibrating acoustic device as described in claim 11, wherein
the magnetic system has a first magnetic conduction member and a
second magnetic conduction member surrounding the first magnetic
conduction member for forming the magnetic gap, at least one of the
first and second magnetic conduction members is a permanent
magnet.
16. The vibrating acoustic device as described in claim 15, wherein
the first and the second magnetic conduction members are spaced
from each other.
17. The vibrating acoustic device as described in claim 15, wherein
the first and the second magnetic conduction members are partially
connected with each other.
Description
FIELD OF THE INVENTION
[0001] The present invention generally relates to an acoustic
device, and more particularly, to a vibrating acoustic device for
generating high-frequency, medium-frequency and low-frequency
acoustic waves.
DESCRIPTION OF RELATED ART
[0002] With the rapid development of technologies, the design of
electronic devices, such as cellular phones, PDAs (personal digital
assistants), and so on, is being driven by the marketplace towards
providing more and more multimedia functions. At the same time,
consumer's demand has been continuing to push a dramatic reduction
in the size of the electronic devices.
[0003] To comply with the multimedia requirements and reduce the
size of the electronic devices, most electronic devices today
include an vibrating acoustic device for generating audible sounds
through vibration. The vibrating acoustic device comprises a
holder, a vibrating system and a magnetic system received in the
holder, respectively. The vibrating system comprises a coil and a
diaphragm driven by the coil. Such an acoustic device only provides
sounds with a certain range of frequency, e.g. high frequency
sound, or mediate frequency sound. If an electronic device need
full frequency band sounds, three acoustic devices are needed to
perform the high frequency sound, mediate frequency sound, and low
frequency sound, respectively, which obviously increases the
cost.
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] FIG. 1 is an illustrative cross-sectional view of a
vibrating acoustic device in accordance with an exemplary
embodiment of the present disclosure.
[0005] FIG. 2 is also an illustrative cross-sectional view of a
vibrating acoustic device, which is similar to the device in FIG.
1.
DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENT
[0006] Referring to FIG. 1, a vibrating acoustic device 10 in
accordance with an exemplary embodiment of the present disclosure
comprises a frame 2 and a vibrating unit 1 received in the frame 2
for generating sound in all frequency bands including
low-frequency.
[0007] The frame 2 comprises a lower panel 21, a cover 22 mounted
on the lower panel 21, a receiving space 23 formed by the lower
panel 21 and the cover 22, and an acoustic hole 24 formed in the
upper cover 22 and opposite to the lower panel 21.
[0008] The vibrating unit 1 comprises a holder 11, a first
vibrating system 12 mounted on a lower portion of the holder 11, a
second vibrating system 13 attached on an upper portion of the
holder 11, and a magnetic system 4 received in the holder 11. The
holder 11 has a hollow space for receiving the magnetic system 4
and the first and second vibrating systems 12, 13.
[0009] The magnetic system 4 comprises a first magnetic conduction
member 41, a second magnetic conduction member 42 surrounding the
first magnetic conduction member 41, a pair of first pole plates 43
attached on two sides of the first magnetic conduction member 41, a
pair of second pole plates 44 attached on two sides of the second
magnetic conduction member 42, and a magnetic gap 45 formed by
outer surfaces of the first magnetic conduction member 41 and the
first pole plates 43 together with the inner surfaces of the second
magnetic conduction member 42 and the second pole plates 44. The
first and second pole plates 43, 44 are made of magnetic conduction
materials for effectively conducting magnetic fluxes, respectively.
In this embodiment, the first and second magnetic conduction
members 41, 42 are permanent magnets. Optionally, in an alternative
embodiment, at least one of the first and second magnetic
conduction members 41, 42 is a permanent magnet. And the first and
second pole plates 43, 44 may be omitted for reducing the whole
volume of the system.
[0010] The first vibrating system 12 comprises a vibrating plate
121 attached on a lower side of the holder 11 for resonating with a
resonate media (e.g., the lower panel) to resonate and radiating
sound in low-frequency region, a first coil 122 connected with the
vibrating plate 121 and a first elastic supporting member 16
mounted the vibrating plate 121 and surrounded by the first coil
122 for elastically supporting the first magnetic conduction member
41 and providing a pre-pressure to the vibrating plate 121. The
first coil 122 has an end inserted and suspended in the magnetic
gap 45 and another end directly or indirectly connected with the
vibrating plate 121 for driving the vibrating plate 121. An upper
side of the vibrating plate 121 is attached on the lower part of
the holder 11 and the lower side of the vibrating plate 121 is
coupled with the lower panel 21. The magnetic system 4 cooperates
with the first coil 122 to drive the vibrating plate 121 to vibrate
for causing the lower panel 21 coupled with the vibrating plate 121
to resonate and radiate sound in low-frequency region, such as
sounds with frequency under 600 Hz.
[0011] Optionally and improvably, the first vibrating system 12
further comprises a second elastic supporting member 15 sandwiched
between the lower side of the holder 1 and a the second pole plate
44 for elastically supporting the holder 1. A part of the second
pole plates also attach on the second elastic supporting member 15.
The second elastic supporting member 15 surrounds the first coil
122. The first and second elastic supporting members 16, 15 are
made of soft silicone or foam.
[0012] The second vibrating system 13 comprises a diaphragm 131
attached on an upper side of the holder 11 and partially exposed
from the acoustic hole 24, and a second coil 132 having an end
inserted and suspended in the magnetic gap 45 and another end
directly or indirectly connected with the diaphragm 131 for driving
the diaphragm 131. When the second coil 132 is activated by an
electric audio signal, an electromagnetic force occurs between the
second coil 132 and the magnetic system 4. This forces the
diaphragm 131 to vibrate, thereby generating high and medium
frequency sounds which are emitted to an environment perceivable by
a listener.
[0013] The cover 22 has an upper plate 221 surrounding the acoustic
hole 24 and a sidewall 222 extending from the upper plate 221 and
coupled to the lower panel 21. The sidewall 222 comprises a
supporting wall 223 for supporting the upper plate 221 and an
elastic wall 224 connecting with the supporting wall 223 and the
lower plane 21 for absorbing the vibration generating from the
lower plane 21 and the first vibrating system 12 and for preventing
the vibration generated by the lower plane 21 and the first
vibrating system 12 influencing the sound quality of the second
vibrating system 13.
[0014] The first magnetic conduction member 41 is spaced from the
second magnetic conduction member 42 for forming the magnetic gap
45 shared by the first and second coils 122, 132. In an alternative
embodiment, the first magnetic conduction member is partially
connected with a second magnetic conduction member for dividing the
magnetic gap discussed above into two separated parts, such as a
first magnetic gap for partially receiving the first coil and a
second magnetic gap for partially receiving the second coil.
Additional, the second magnetic conduction member is capable of
supporting the first magnetic conduction member, thereby the first
elastic supporting member can be omitted.
[0015] In an alternative embodiment, referring to FIG. 2, the frame
can be omitted. The vibrating plate 12 is directly coupled with an
external resonant media other than the lower panel, such as
computers, mobile phone screens desktop, or other media to resonate
and radiate the low-frequency acoustic output. In an optional
embodiment, the holder can be omitted and the vibrating system is
mounted on the magnetic system. For example, the second vibrating
system is mounted on an upper side of the magnetic system and the
first vibrating system is mounted on a lower side of the magnetic
system.
[0016] While the present invention has been described with
reference to the specific embodiments, the description of the
invention is illustrative and is not to be construed as limiting
the invention. Various of modifications to the present invention
can be made to the exemplary embodiments by those skilled in the
art without departing from the true spirit and scope of the
invention as defined by the appended claims.
* * * * *